CVE-2026-74487: binfmt_misc: restore write access when removing an entry
Vulnerability summary
CVE-2026-74487 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.
No CVSS vector published; no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 15 · Related 14Timeline
- 15-08-2026PublishedVulnerability first disclosed.
- 23-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access when removing an entry Registering an entry with the MISC_FMT_OPEN_FILE flag opens the interpreter via open_exec() which denies write access to it for as long as the entry exists. Removing the entry closes the interpreter file via filp_close() but never restores write access, leaving the inode's i_writecount permanently negative. Opening the interpreter for writing keeps failing with ETXTBSY long after the entry is gone until the inode is evicted from the inode cache. Commit 90f601b497d7 ("binfmt_misc: restore write access before closing files opened by open_exec()") fixed the same imbalance in the error path of bm_register_write() but the actual removal path has been leaking the write denial since the introduction of the flag. Restore write access in put_binfmt_handler() before closing the interpreter file.
CVSS metrics
Risk metrics not yet published.
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.18% on 06-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: not stated in public data.
Ubuntu168 products
- linuxAll versions (No fix recorded) | < 5.15.0-202.212 | < 7.0.0-42.42
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1119.126 | < 7.0.0-1016.17
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
- linux-6.12< 6.12.107-1~deb12u1
Linux1 product
- linux≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < 7873f987213695e3564c8c259e6db283e4739472 | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < 13efc628fdf641d901bdba07caa1c558e1bed046 | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < f1cf67f6be0babc73afa4ee0e27bdedffeeeb095 | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8 | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < fdc1d702bf3001586221fa07e598e876a0a854c5 | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < 3b522487a3a9162b1b519eefde7998d103e3e07b | ≥ 948b701a607f123df92ed29084413e5dd8cda2ed, < db1856ea9196cf6e015d12199a34c0b9313c7bfa | 4.8
3 vendors · 171 products
